It has large space in its mouth , pets around 5kg may all be able to use it , so cute ! *Especially suitable for newborn baby and the ones who lack of security *windproof,much warmer while sleeping inside *short plush fabrics feel exquisite and comfortable *filled with high quality sponge,thick, not easy to deformation *PP cotton inside the mat,soft and detachable,easy to clean *Botton is Oxford cloth: non-slip and moisture proof.